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Solve basic auth proxy issues with Nuget, Visual Studio and Xamarin (hack)

23 Aug, 2016
When you’re using Visual Studio behind a Basic Authenticaton proxy, you may run into issues restoring Nuget packages. While I’ve never found a real solution for the issue, and trust me I’ve tried quite a few workarounds like the ones listed here.

You’ll get the following error:

[5:06] Download failed. Please download https://dl-ssl.google.com/android/repository/android_m2repository_r29.zip and put it to the C:UsersuserAppDataLocalXamarinXamarin.Android.Support.Design23.3.0.0 directory.
[5:06] Reason: The remote server returned an error: (407) Proxy Authentication Required.

I’ve come to rely on my trusted hacking friend Fiddler and turn on “Automatically Authenticate”.

Optionally configure your upstream proxy in Fiddler:

Restart Visual Studio so it picks up Fiddler as the proxy and you’re good to go. Just leave Fiddler running in the background and all will be well.

Jesse is a passionate trainer and coach, helping teams improve their productivity and quality all the while trying to keep work fun. He is a Professional Scrum Trainer (PST) through Scrum.org for the Professional Scrum Foundations (PSF), Professional Scrum Master (PSM) and Developer (PSD .NET) programs. With a strong background in the .NET platform and C#, Jesse is able to translate the needs of development teams when it comes to tools to manage work, build the code and keep quality up. He has contributed to a number of open source products that extend – as well as supported commercial tools like NDepend in their integration into – Team Foundation Server. Jesse regularly blogs and contributes to numerous communities on StackExchange and MSDN networks, he has received the Microsoft Community Contributor Award three years in a row and has been recently been awarded the Microsoft Most Valuable Professional award. He’s spoken at conferences and user groups, including the Microsoft TechDays and the Scrum Day Europe. Trainer certifications: Professional Scrum Foundations Professional Scrum Master Professional Scrum Developer (.NET) Scaled Professional Scrum (SPS) Scaled Agile Program Consultant In past years Jesse has delivered ALM, Test Automation and Scrum training all over the world, most recently in Sydney, Milan and Bangalore. He has redelivered materials from industry leading partners as well as developed his own. In addition to the previously mentioned subjects Jesse has taught courses on Visual Studio, Object Oriented Analysis and Design, Design Patterns for C# developers, Unified Modelling languages and Regular Expressions. Jesse is married with Charlotte, recently became father of his first daughter and lives in a house that’s more than a century old in the beautiful city of Utrecht. He loves espresso and dark chocolate, travels a lot and takes photos everywhere he goes.

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